Dreams often weave together various elements from our past and present, reflecting our feelings, relationships, and experiences. In your dream, several key themes stand out:

1. Reconnection with the Past: The presence of your elementary school friend, your exes, and your old job suggests themes of nostalgia and unresolved feelings. These figures might represent aspects of your past that you are reflecting on, whether it's old friendships, relationships, or professional experiences.
2. Intimacy and Vulnerability: The encounter with the family friend could symbolize feelings of intimacy or desire, but the detail about his small penis might indicate some discomfort or anxiety about vulnerability in relationships. It could also represent your feelings about intimacy and expectations.
3. Parental Connection: Your son appearing and playing video games together suggests a focus on family and the joy of being present with loved ones. This might signify a need for connection and a reminder of the importance of nurturing your relationship with your son amidst other life complexities.
4. Transition and Change: Moving from a party to an old rental house implies a journey through memories and past experiences. This could indicate that you are processing transitions in your life and how they relate to your current circumstances.

Overall, this dream might be inviting you to reflect on how past relationships influence your present, the nature of intimacy in your life, and the importance of family connections. Consider what emotions these scenes evoke in you and how they might relate to your waking life.